tags:

Check if a Command Exists

Use `command -v` — portable, no subshell, returns nonzero if missing.

Author: chris

// Language: Bash

#!/usr/bin/env bash
set -euo pipefail

need() {
    command -v "$1" >/dev/null 2>&1 || {
        printf 'missing required tool: %s\n' "$1" >&2
        exit 1
    }
}

need jq
need curl
need git